Lock.



PATENTED MAY 29, 1906. B. GEORGE.

LOOK.

APPLICATION FILED MAY 8, 1905.

Inventor r Attorneys Witnesses %%W UNITED STATES PATENT OFFICE.

WILLIAM E. CULLUM AND ON E-SI-XTH TO J ESSE'GR TENNESSEE.

LOCK.

Specification of Letters Patent.

Patented. May 29, 1906.

Application filed MayB, 1905. Serial No. 259,465.

To all whom it may concern:

Be it known that I, EDWIN GEORGE, a citi zen of the United States,residing at Dickson, in the county of Dickson and State of Tennessee,have invented a new and useful Look, of which the following is aspecification.

This inventionrelates to door-locks, more particularly to the class ofcombined locks and latches, and has for its object to simplify and imrove the construction and increase the uti ity' and efiiciency ofdevices of this character.

With these and other objects in view, which will appear as the nature ofthe invention is better understood, the same consists in certain novelfeatures of construction, as hereinafter fully described and claimed.

In the accompanying drawings, forming a part of this specification, andin which corresponding parts are denoted by like designating characters,is illustrated the preferred form of embodiment of the invention capableof carrying the same into practical operation, it being understood thatthe invention is not necessarily limited thereto, as various changes inthe shape, proportions, and general assemblage of the parts may beresorted to without departing from the principle of the invention orsacrificing any of its advantages.

In the drawings thus employed, Figure 1 is a side elevation of theimproved lock and its keeper with the cover of the casing removed. Fig.2 is a transverse section on the line 2 2 of Fig. 1. Fig. 3 is aperspective of the keeper member detached.

The improved device comprises a casing for attachment to'the door andthrough which the knob-spindle, a portion of which is represented at 11,is disposed.

The casing may be of the rim or mortise form for attachment outside thedoor or in a mortise in the edge of the same in the usual manner, and nochange in the interior construction will be required to adapt the deviceto either form; but as the construc tion of lock-casings is so wellknown the slight difference in the structure between the rim and mortiseform is not shown.

Mounted upon the spindle 11 within the casing is a sleeve 12, havingbearings 13 14 at the ends engaging bearing-apertures in the casing, thesleeve thus serving as a support to the spindle and partaking of itsmovementi Extending from the sleeve 12 is an arm 15, which'forms thelocking-bolt of'the device and extends at the free end 16 through anaperture 17 in the end of the casing;

Mounted for rotation by bearings 18 19 in bearing-apertures in'the sidewalls of the casingis a stop member 20 for swinging into the path of thebolt member 15 when in one position and free therefrom when in anotherposltion.

The stop member is provided with spaced ears 21 22, between which a bar23 is pivoted, as at 24, the bar extending within the casing andprovided with a relatively elongated notch 25 and smaller spaced notches26 27, the smaller notches for alternate engagement with a stationarystop 28, extending transversely Within the casing, and the longer notchto receive the wards of a key 29, in-

serted through a keyhole 30. By this ar rangement when the key isrotated the wards of the same will first engage the bar Within the notch25 and elevate the bar free from the stop 28 and then move the barlongitudinally of the casing by the action of the key against the end ofthe larger notch and correspondingly move the stop member 20 either intoa downward osition, as in full lines in Fig. 1, or into an e evatedposition, as shown by dotted lines in the same figure.

When in its downward position, the member 20 will hold the bolt 15depressed and immovable or in locked position, but when in its upwardposition the bolt can be elevated by rotating the knob-spindle, as willbe obvious.

. The arm 23 may be supplied with any of the usual and Well-knownsystems of checking or trip tumblers to complicate the key structure,and thus prevent surreptitious operation of the locking mechanism but asthe construction and operation of these tumblers are so well known it isnot deemed necessary to illustrate them.

The bolt member 15 is provided with a recess 31 in its upper surface,which the free end of the stop member 20 enters as the bolt is elevated,and thus enables the mechanism to be more compactly disposed in thecasing and to enable a smaller casing to be employed.

The free end 16 of the bolt 15. projecting OSBY, OF DICKSON,

beyond the casing, is designed to engage a suitable keeper attached tothe door-j amb,

and an approved form of such a keeper is shown at 32 with a recess 33for receiving the bolt end and with an inclined approach 34 to therecess to provide means for causing the bolt to automatically enter therecess as the door is closed.

Screw-holes 35 are provided in the keeper to receive thefastening-screws.

It will thus be noted that a simply-constructed and eifective andinexpensive locklatch is provided which may be adapted to any size orthickness of door and also adapted to all the uses for which devices ofthis class are usually employed.

Having thus describedthe invention, what is claimed is- In a lock, thecombination of a casing having a knob spindle mounted for rotationtherethrough, a bolt carried bysaid spindle and partaking of itsmovement, a keeper for receiving the free end of said bolt, a shaftjournaled in said casing and provided with a stop member extending intothe path of the bolt when the shaft is in one position and withdrawnfrom the path of the bolt when the shaft is in its other position, astationary stop within said casing, an arm movably coupled to said stop-member and provided with spaced recesses, and a key adapted to actuatesaid bar and cause the recesses therein to be alternately engaged withsaid stationary stop.

In testimony that I claim the foregoing as my own I have hereto aflixedmy signature in the presence of two witnesses.

EDWIN GEORGE.

Witnesses M. HARRIS, W. H. MOMURREY.

